ossuminc / riddl
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28683750100

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reid-spencer 
Add compareRoots — Root-AST structural similarity API

Adds a deterministic, model-free similarity/diff API for comparing two
RIDDL Root ASTs, requested by ossum-gen for its compositional-fidelity
benchmark (regression guard: does a model generated from a README have
the same rough shape as the hand-authored corpus model?).

New in passes/analysis/RootComparison.scala (Native-safe, no regex or
java formatting):
- compareRoots(a, b) -> RootSimilarity: per-kind counts (Map[String,
  (Int,Int)]), fuzzy matched/unmatched name pairs per kind, structural
  metrics (max depth, breadth), and an overall weighted score in
  [0.0, 1.0] (exactly 1.0 for identical roots).
- similarityMarkdown(a, b): human/AI-readable report.
- Both surfaced on the RiddlLib trait and object (additive only; no
  existing signature changed).

Counts/names/breadth are taken from OutlinePass (records containers AND
leaves, so leaf kinds such as Invariant/Constant are included, and
counts stay consistent with the names being matched); depth is taken
from StatsPass.maximum_depth. Structural wrappers (Root, Nebula) are
excluded so breadth reflects real top-level containers. Matching is on
kind + fuzzy name (lowercase-alphanumeric normalization, greedy best
Levenshtein-ratio pairing) — location- and case-independent — never on
Definition.equals/hashCode (which include loc).

Scoring: per kind 0.6*countComparability + 0.4*nameOverlap; overall
0.7*weightedMean + 0.3*countVectorCosine, weighting DDD-structural
kinds above incidental ones.

10 tests (JVM + Native): identical=1.0, empty=1.0, counts match a manual
StatsPass reading, breadth counts domains not Root, depth matches
StatsPass, case/location independence, renamed-but-equal stays high,
ordering identical > case-only > renamed > unrelated, markdown render,
and a real-model pair (dokn vs rbbq).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

147 of 156 new or added lines in 1 file covered. (94.23%)

39 existing lines in 20 files now uncovered.

7679 of 11769 relevant lines covered (65.25%)

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28683750100 main Add compareRoots — Root-AST structural similarity API Adds a deterministic, model-free similarity/diff API for comparing two RIDDL Root ASTs, requested by ossum-gen for its compositional-fidelity benchmark (regression guard: does a model generate... push reid-spencer
65.25
28683473913 development Add compareRoots — Root-AST structural similarity API Adds a deterministic, model-free similarity/diff API for comparing two RIDDL Root ASTs, requested by ossum-gen for its compositional-fidelity benchmark (regression guard: does a model generate... push reid-spencer
65.25
28611035274 main Merge branch 'main' into development push reid-spencer
64.72
28610950678 development Merge branch 'main' into development push reid-spencer
64.72
28610860364 development Fix GBNF converter to emit grammar llama.cpp can parse ebnf_to_gbnf.py emitted escapes llama.cpp's GBNF parser rejects: regex \/ and \. carried verbatim into char classes/literals, and single-quoted EBNF literals ('"') passed through (GBNF has no... push reid-spencer
64.72
28594650224 main Add JSON-identity round-trip tests; make unbounded String a JSON fixed point Strengthen the fidelity guarantee from "no new validation errors" to true serializer idempotence: root0 -> json1 -> root1 -> json2, asserting json1 == json2. A stable fi... push reid-spencer
64.62
28551458097 main Make parseJson tolerant of AI-natural type-expression shapes Two additive tolerances in JsonModel.readTypeExpr, both strictly more permissive (every currently-valid document parses identically): - Unknown `kind` -> Alias. A `kind` that is not on... push reid-spencer
64.62
28550772676 main Add root2Json — AST -> JSON serializer (inverse of parseJson) Implements the symmetric inverse of parseJson as a plain recursive serializer (JsonSerializer, the inverse of JsonAstBuilder), not a Pass — walks an AST.Root to a JsonModel.RootDto, th... push reid-spencer
64.62
28485826631 main Mark JSON input Phase 9 done; all 9 phases complete Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> push reid-spencer
64.62
26903189958 development Upgrade action versions to avoid deprecation warnings. push reid-spencer
64.72
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